Study of lower-hybrid cavities detected by the GEODESIC and OEDIPUS-C sounding rocket missions

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dc.contributor.advisorKnudsen, David J.
dc.contributor.authorBock, Benjamin John Jude
dc.date.accessioned2017-12-18T22:40:32Z
dc.date.available2017-12-18T22:40:32Z
dc.date.issued2005
dc.descriptionBibliography: p. 151-160en
dc.description.abstractLHCs are structures in our upper ionosphere embedded within regions of strong plasma wave activity, referred to as auroral hiss. Heating inside these cavities (up to 50 times the ambient temperature) is contained within long, thin (rv 20 m across), cylindrically-shaped density depletions (up to tens of percent) aligned along the geomagnetic field. Trapped within these cavities are enhanced plasma waves, believed to be responsible for transversely accelerated ions (TAis). In this thesis we investigate a new depletion mechanism by which the particles are ejected transverse to the magnetic field , which predicts density enhancements at the cavity boundaries. These enhancement have been observed and cataloged for the first time as a part of this thesis. We find peak wave intensity does not occur at the cavity center but instead coincides with the maximum density gradient of the cavity. This result we hope will lead to a theory of the electromagnetic wave enhancements within LHCs. Using a new, high time-resolution instrument developed at the University of Calgary, we calculate the average energy of the TAis and find a moderate positive correlation between the heating region width and the maximum average energy reached by the TAis, suggesting that large LHCs dump more energy into the TAis.
dc.format.extentxvii, 196 leaves : ill. ; 30 cm.en
dc.identifier.citationBock, B. J. (2005). Study of lower-hybrid cavities detected by the GEODESIC and OEDIPUS-C sounding rocket missions (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/5195en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/5195
dc.identifier.isbn049405445Xen
dc.identifier.lccAC1 .T484 2005 B63en
dc.identifier.urihttp://hdl.handle.net/1880/106196
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.titleStudy of lower-hybrid cavities detected by the GEODESIC and OEDIPUS-C sounding rocket missions
dc.typemaster thesis
thesis.degree.disciplinePhysics and Astronomy
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
ucalgary.thesis.accessionTheses Collection 58.002:Box 1557 520492074
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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